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CALIBRATION
TEC Calibration Procedures
06_03 TCM-39032 19
CHAPTER 3
After the last “TEC:ITE” value is entered, the “*OPC?” query may be used to determine
when the calibration sequence is done. However, the *OPC”, or “*WAI” command, or
“*OPC?” query should not be issued until after the last “TEC:ITE” value is entered or the
system will “hang”. This happens because the LDC-3900 will wait indefinitely for an input,
yet not allow any input until the calibration is finished.
If the “*OPC?” query is issued during ITE calibration, the time out period of the GPIB
driver should be at least 1 minute to prevent the GPIB driver from timing out and
“hanging” the system. Refer to the GPIB driver instruction manual for information on
setting the GPIB driver time out period.
The operation complete flag (bit 0 of the Standard Event Status Register) may be used to
trigger a service request. This type of interrupt is enabled by setting bit 0 of the Service
Request Enable Register (via the *ESE command) and bit 5 of the Service Request
Enable Register (via the *SRE command). Service request (SRQ) handling depends on
your GPIB hardware. Refer to the GPIB manual for details.